Upgrade atlas graph and desktop reader layout

web/static/app.js

@@ -9,15 +9,18 @@ const state = {
   searchItems: [],
   searchTotal: 0,
   aiBusy: false,
+  atlasChart: null,
 };
 
 const $ = (selector) => document.querySelector(selector);
 
 const elements = {
+  app: $(".atlas-app"),
   healthLine: $("#healthLine"),
   searchInput: $("#searchInput"),
   searchBtn: $("#searchBtn"),
   mapTitle: $("#mapTitle"),
+  atlasChart: $("#atlasChart"),
   atlasSvg: $("#atlasSvg"),
   routeList: $("#routeList"),
   timeline: $("#timeline"),
@@ -61,16 +64,74 @@ async function api(path, options = {}) {
   return payload;
 }
 
+function loadChartEngine() {
+  if (window.echarts) {
+    if (state.atlas) renderAtlasMap();
+    return;
+  }
+  if (document.querySelector("script[data-chart-engine='echarts']")) return;
+
+  const script = document.createElement("script");
+  script.src = "/static/vendor/echarts.min.js?v=6.1.0";
+  script.async = true;
+  script.dataset.chartEngine = "echarts";
+  script.onload = () => {
+    if (state.atlas) renderAtlasMap();
+  };
+  script.onerror = () => {
+    console.warn("ECharts atlas enhancement unavailable; SVG fallback remains active.");
+  };
+  document.head.appendChild(script);
+}
+
 function topicLabel(topic) {
   const found = state.atlas?.topics?.find((item) => item.id === topic);
   return found?.label || topic.replaceAll("-", " ");
 }
 
 function colorFor(index) {
-  const colors = ["#0d766f", "#ba5644", "#aa7419", "#527b46", "#665d9f", "#236092", "#8a5a25"];
+  const colors = ["#0b7a75", "#c95745", "#b37a22", "#4d7f52", "#5f63b5", "#22699a", "#9a5d2f", "#7b4aa0"];
   return colors[index % colors.length];
 }
 
+function hexToRgb(hex) {
+  const clean = String(hex || "").replace("#", "");
+  const value = Number.parseInt(clean.length === 3 ? clean.replace(/(.)/g, "$1$1") : clean, 16);
+  return {
+    r: (value >> 16) & 255,
+    g: (value >> 8) & 255,
+    b: value & 255,
+  };
+}
+
+function hexToRgba(hex, alpha) {
+  const { r, g, b } = hexToRgb(hex);
+  return `rgba(${r}, ${g}, ${b}, ${alpha})`;
+}
+
+function mixColor(hex, target, amount) {
+  const base = hexToRgb(hex);
+  const next = hexToRgb(target);
+  const mix = (left, right) => Math.round(left + (right - left) * amount);
+  return `rgb(${mix(base.r, next.r)}, ${mix(base.g, next.g)}, ${mix(base.b, next.b)})`;
+}
+
+function chartGradient(color) {
+  if (!window.echarts?.graphic?.RadialGradient) return color;
+  return new window.echarts.graphic.RadialGradient(0.34, 0.28, 0.86, [
+    { offset: 0, color: "#ffffff" },
+    { offset: 0.58, color: mixColor(color, "#ffffff", 0.64) },
+    { offset: 1, color },
+  ]);
+}
+
+function setReaderMode(enabled) {
+  const changed = elements.app.classList.toggle("reader-mode", Boolean(enabled));
+  if (changed && state.atlas) {
+    window.requestAnimationFrame(() => renderAtlasMap());
+  }
+}
+
 async function loadHealth() {
   try {
     const health = await api("/api/health");
@@ -90,11 +151,234 @@ async function loadAtlas() {
   renderOverview();
 }
 
+function atlasTopics() {
+  return state.atlas.topics.filter((topic) => topic.count >= 30).slice(0, 13);
+}
+
+function setAtlasRenderer(useChart) {
+  if (elements.atlasChart) elements.atlasChart.hidden = !useChart;
+  if (elements.atlasSvg) elements.atlasSvg.hidden = useChart;
+}
+
 function renderAtlasMap() {
+  if (window.echarts && elements.atlasChart) {
+    try {
+      renderEchartsAtlasMap();
+      return;
+    } catch (error) {
+      console.warn("ECharts atlas failed, falling back to SVG", error);
+    }
+  }
+  renderSvgAtlasMap();
+}
+
+function renderEchartsAtlasMap() {
+  const isMobile = window.matchMedia("(max-width: 760px)").matches;
+  const readerMode = elements.app.classList.contains("reader-mode");
+  let topics = atlasTopics();
+  if (readerMode && !isMobile) {
+    topics = topics.slice(0, 10);
+  }
+  const topicMap = new Map(topics.map((topic, index) => [topic.id, { ...topic, index }]));
+  const maxCount = Math.max(...topics.map((topic) => topic.count), 1);
+  setAtlasRenderer(true);
+
+  if (!state.atlasChart) {
+    state.atlasChart = window.echarts.init(elements.atlasChart, null, {
+      renderer: "canvas",
+      useDirtyRect: true,
+    });
+  }
+
+  const width = elements.atlasChart.clientWidth || (isMobile ? 360 : 780);
+  const height = elements.atlasChart.clientHeight || (isMobile ? 360 : 460);
+  const isCompact = isMobile || width < 690 || elements.app.classList.contains("reader-mode");
+  const padding = isCompact
+    ? { left: 46, right: 86, top: 42, bottom: 54 }
+    : { left: 92, right: 92, top: 64, bottom: 74 };
+  const layoutX = (topic) => (isCompact ? topic.x - Math.max(0, topic.x - 64) * 0.65 : topic.x);
+  const xs = topics.map(layoutX);
+  const ys = topics.map((topic) => topic.y);
+  const minX = Math.min(...xs);
+  const maxX = Math.max(...xs);
+  const minY = Math.min(...ys);
+  const maxY = Math.max(...ys);
+  const xSpan = Math.max(maxX - minX, 1);
+  const ySpan = Math.max(maxY - minY, 1);
+  const plotWidth = Math.max(width - padding.left - padding.right, 260);
+  const plotHeight = Math.max(height - padding.top - padding.bottom, 230);
+  const sizeBase = isCompact ? (isMobile ? 24 : 36) : 48;
+  const sizeRange = isCompact ? (isMobile ? 30 : 42) : 62;
+
+  const nodes = topics.map((topic, index) => {
+    const color = colorFor(index);
+    const active = topic.id === state.activeTopic;
+    const symbolSize = sizeBase + sizeRange * Math.sqrt(topic.count / maxCount);
+    return {
+      id: topic.id,
+      name: topic.label,
+      value: topic.count,
+      x: padding.left + ((layoutX(topic) - minX) / xSpan) * plotWidth,
+      y: padding.top + ((topic.y - minY) / ySpan) * plotHeight,
+      symbolSize,
+      count: topic.count,
+      recent_count: topic.recent_count,
+      heat: topic.heat,
+      question: topic.question,
+      stance: topic.stance,
+      itemStyle: {
+        color: chartGradient(color),
+        borderColor: active ? "#17201c" : mixColor(color, "#101614", 0.08),
+        borderWidth: active ? 3 : 1.4,
+        shadowBlur: active ? 30 : 18,
+        shadowColor: hexToRgba(color, active ? 0.34 : 0.2),
+      },
+      label: {
+        color: active ? "#0f1714" : "#18211d",
+      },
+    };
+  });
+
+  const links = state.atlas.edges
+    .filter((edge) => topicMap.has(edge.source) && topicMap.has(edge.target))
+    .map((edge) => ({
+      source: edge.source,
+      target: edge.target,
+      value: edge.count,
+      lineStyle: {
+        width: Math.max(1, 1.2 + edge.strength * 5.4),
+        opacity: Math.min(0.58, 0.13 + edge.strength * 0.5),
+        color: hexToRgba(colorFor(topicMap.get(edge.source).index), 0.48),
+        curveness: 0.08,
+      },
+    }));
+
+  state.atlasChart.setOption(
+    {
+      backgroundColor: "transparent",
+      animationDuration: 850,
+      animationDurationUpdate: 450,
+      animationEasing: "cubicOut",
+      tooltip: {
+        trigger: "item",
+        confine: true,
+        appendToBody: true,
+        backgroundColor: "rgba(252, 253, 249, 0.97)",
+        borderColor: "rgba(31, 37, 33, 0.18)",
+        borderWidth: 1,
+        padding: [10, 12],
+        textStyle: {
+          color: "#151b18",
+          fontSize: 12,
+          lineHeight: 18,
+        },
+        extraCssText: "box-shadow:0 16px 42px rgba(24,31,28,.16);border-radius:8px;",
+        formatter(params) {
+          if (params.dataType === "edge") {
+            return `
+              <strong>${escapeHtml(topicLabel(params.data.source))} ↔ ${escapeHtml(topicLabel(params.data.target))}</strong><br>
+              共现证据：${escapeHtml(params.data.value)}
+            `;
+          }
+          const item = params.data;
+          return `
+            <strong>${escapeHtml(item.name)}</strong><br>
+            ${escapeHtml(item.count)} papers · recent +${escapeHtml(item.recent_count)}<br>
+            <span style="color:#68706b">${escapeHtml(item.question)}</span>
+          `;
+        },
+      },
+      series: [
+        {
+          type: "graph",
+          layout: "none",
+          data: nodes,
+          links,
+          roam: true,
+          draggable: true,
+          center: isCompact ? (isMobile ? ["80%", "50%"] : ["120%", "50%"]) : ["50%", "50%"],
+          zoom: isCompact ? (isMobile ? 0.64 : 0.72) : 1,
+          nodeScaleRatio: isCompact ? 0.24 : 0.5,
+          cursor: "pointer",
+          selectedMode: "single",
+          scaleLimit: { min: 0.45, max: 3.2 },
+          label: {
+            show: true,
+            position: "inside",
+            overflow: "truncate",
+            formatter(params) {
+              return `{name|${params.data.name}}\n{meta|${params.data.count} · +${params.data.recent_count}}`;
+            },
+            rich: {
+              name: {
+                fontSize: isCompact ? (isMobile ? 9 : 10) : 12,
+                fontWeight: 850,
+                lineHeight: isCompact ? (isMobile ? 12 : 13) : 16,
+              },
+              meta: {
+                color: "#59625d",
+                fontSize: isCompact ? (isMobile ? 8 : 9) : 10,
+                fontWeight: 700,
+                lineHeight: isCompact ? (isMobile ? 10 : 11) : 13,
+              },
+            },
+          },
+          lineStyle: {
+            color: "source",
+            cap: "round",
+          },
+          emphasis: {
+            focus: "adjacency",
+            scale: 1.08,
+            itemStyle: {
+              shadowBlur: 36,
+            },
+            lineStyle: {
+              opacity: 0.82,
+              width: 4,
+            },
+            label: {
+              color: "#0b1411",
+            },
+          },
+          blur: {
+            itemStyle: {
+              opacity: 0.28,
+            },
+            lineStyle: {
+              opacity: 0.06,
+            },
+            label: {
+              opacity: 0.35,
+            },
+          },
+          select: {
+            itemStyle: {
+              borderColor: "#111714",
+              borderWidth: 3,
+              shadowBlur: 34,
+            },
+          },
+        },
+      ],
+    },
+    true,
+  );
+
+  state.atlasChart.off("click");
+  state.atlasChart.on("click", async (params) => {
+    if (params.dataType !== "node" || !params.data?.id) return;
+    await selectTopic(params.data.id);
+    scrollLensIntoView();
+  });
+}
+
+function renderSvgAtlasMap() {
   const topics = state.atlas.topics.filter((topic) => topic.count >= 30).slice(0, 13);
   const topicMap = new Map(topics.map((topic, index) => [topic.id, { ...topic, index }]));
   const maxCount = Math.max(...topics.map((topic) => topic.count), 1);
   const isMobile = window.matchMedia("(max-width: 760px)").matches;
+  setAtlasRenderer(false);
   elements.atlasSvg.setAttribute("viewBox", isMobile ? "16 -4 78 86" : "0 0 170 100");
   const point = (topic) => ({
     x: isMobile ? topic.x : 14 + topic.x * 1.58,
@@ -229,6 +513,7 @@ function routeButtons(routes) {
 }
 
 function renderOverview(aiHtml = "") {
+  setReaderMode(false);
   state.view = "atlas";
   state.selectedPaper = null;
   elements.lensEyebrow.textContent = "Atlas";
@@ -296,6 +581,7 @@ async function selectTopic(topic) {
 }
 
 function renderTopic(focus, aiHtml = "") {
+  setReaderMode(false);
   state.view = "atlas";
   elements.lensEyebrow.textContent = "Topic";
   elements.lensTitle.textContent = focus.label;
@@ -366,6 +652,7 @@ function renderTopic(focus, aiHtml = "") {
 function renderRoute(routeId) {
   const route = state.atlas.routes.find((item) => item.id === routeId);
   if (!route) return;
+  setReaderMode(false);
   state.selectedPaper = null;
   elements.lensEyebrow.textContent = "Route";
   elements.lensTitle.textContent = route.title;
@@ -397,6 +684,7 @@ async function runSearch() {
     renderOverview();
     return;
   }
+  setReaderMode(false);
   state.view = "search";
   setModeButtons("search");
   elements.lensEyebrow.textContent = "Search";
@@ -422,6 +710,7 @@ async function runSearch() {
 }
 
 function renderReading() {
+  setReaderMode(false);
   state.view = "reading";
   setModeButtons("reading");
   elements.lensEyebrow.textContent = "Reading";
@@ -465,6 +754,7 @@ async function selectPaper(id) {
 function renderPaperReader(aiHtml = "", abstractHtml = "") {
   const paper = state.selectedPaper;
   if (!paper) return;
+  setReaderMode(true);
   elements.lensEyebrow.textContent = "Paper";
   elements.lensTitle.textContent = "研读";
   elements.lensBody.innerHTML = `
@@ -483,6 +773,7 @@ function renderPaperReader(aiHtml = "", abstractHtml = "") {
     <section class="section">
       <div class="tool-row">
         <a class="paper-link" href="${escapeHtml(paper.url)}" target="_blank" rel="noreferrer">arXiv</a>
+        <button class="tool-button" type="button" data-reader-action="map">回到图谱</button>
         <button class="tool-button" type="button" data-paper-action="abstract">摘要</button>
         <button class="tool-button primary" type="button" data-paper-action="summary">中文摘要</button>
         <button class="tool-button" type="button" data-paper-action="translate">翻译</button>
@@ -580,13 +871,6 @@ function setModeButtons(view) {
   document.querySelectorAll("[data-view]").forEach((button) => {
     button.classList.toggle("active", button.dataset.view === view);
   });
-
-  window.addEventListener(
-    "resize",
-    debounce(() => {
-      if (state.atlas) renderAtlasMap();
-    }, 150),
-  );
 }
 
 function scrollLensIntoView() {
@@ -619,6 +903,7 @@ function bindEvents() {
     const topicAi = event.target.closest("[data-topic-ai]");
     const compareButton = event.target.closest("[data-compare-topic]");
     const paperAction = event.target.closest("[data-paper-action]");
+    const readerAction = event.target.closest("[data-reader-action]");
 
     if (topicButton) {
       await selectTopic(topicButton.dataset.topic);
@@ -638,6 +923,9 @@ function bindEvents() {
       const action = paperAction.dataset.paperAction;
       if (action === "abstract") await loadAbstract();
       else await runPaperAi(action);
+    } else if (readerAction) {
+      if (state.topicFocus) renderTopic(state.topicFocus);
+      else renderOverview();
     }
   });
 
@@ -669,12 +957,20 @@ function bindEvents() {
       scrollLensIntoView();
     });
   });
+
+  window.addEventListener(
+    "resize",
+    debounce(() => {
+      if (state.atlas) renderAtlasMap();
+    }, 150),
+  );
 }
 
 async function boot() {
   bindEvents();
   await loadHealth();
   await loadAtlas();
+  loadChartEngine();
 }
 
 boot();